Riechel, R. (1989). Personnel needs and changing reference service. Library Professional Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRiechel, Rosemarie. Personnel Needs and Changing Reference Service. Hamden, Conn.: Library Professional Publications, 1989.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRiechel, Rosemarie. Personnel Needs and Changing Reference Service. Library Professional Publications, 1989.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.